Oops, it doesn't look like 'unintentional blood donation day' is a national day..

Other days

buddy

Buddy Day

frozen yogurt

Frozen Yogurt Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

cursing

Cursing Day

carpenters

Carpenters Day

pick me

Pick Me Day

get funky

Get Funky Day

offer

Offer Day

hiv awareness

Hiv Awareness Day

donate your hair

Donate Your Hair Day